Intake manifold for multicylinder engines



Jul 18, 1944.

L. 'Ros'roK ER ETAL 2,353,787 INTAKE MANIFOLD FOR MULTICYLINDER ENGINES Filed March 29, 1943 I I III 1 III 1 1 1/1 I 1/ 111/ 1 I .711 wen h rs Louis RwsTo ker 6 Stephen J.ve1yn Patented July 18, 1944 unir o sum was? orrlcs ENTAKE MANIFOLD FOR MULTIC'YLINBER l ENGINES- LouisRostoker and Stephen J. Evelyn, Toronto.

' Ontario, Canada ApplicationMarch 29, 1943, Serial No. 480,894

' so si'ms." (si ns-122) This invention relates to intake manifolds for multi-cylinder engines, andthe object of the invention is to. improve the efficiency of the engine byaccurately regulating thequantity of fuel'mix- ,ture introduced into the cylinders; thoroughly mixing and heating the mixture; and creating a turbulence which will inhibit the precipitation of the fuel on the walls of the intake manifold.

The objects of this invention are obtained by providing a charge regulating chamber communicating with an' intake manifold '01 fuel distributing conduit and having meansfor regulating the flow. of the fuel mixture from the charge regulating chamber into the conduit and the cylinders, and by theno-vel construction of multiii pointed spaced apart heat exchange members in themanifold.

The invention is hereinafter more particularly described and is illustrated by way' of example in the accompanying drawing in which Figure 1 is a plan view;

vFigure'Z a side elevation; a

Figure 3 a longitudinal section on the line 3-3 in Figure l; and

Figure 4 a cross Figure 2.

In the drawing corresponding numbers in the diiier-ent figures refer to corresponding parts.

section on theline L4 in The construction in general is similar to'any conventional intake manifold for multi-cylinder I11 of the engine and comprises a fuel distributing conduit for the fuel mixture and a charge regulating chamber 2 which is shown as being formed integraliy with the conduit I and consisting of an elongated upward extension the longitudinal center line or axis of which extends longitudinally of the conduit and one long side of which opens into said conduit along one side of said conduit.

The charge regulating chamber 2 is provided with a head 3 having a fuel mixture conducting riser 4 located substantially centrally of the chamber 2. The head 3 may be secured to the manifold in any suitable manner such as by bolts 5.

On each side of the inner wall of the manifold at the junction of the upright wall of the cham her 2 and the head 3 is formed a longitudinal groove 6, into which fits the upper longitudinal edge of a deflector 1. Each deflector l is sectional comprising three sections 1*, l E Each cylinders.

section is individually adjustable by means. of

a screw 8, which extends through a threaded .hole intlie upright Wall of the chamber 2, and

through a hole in the deflector, being provided at its end with nuts 9, H3 which hold the deflector in position and permit inward and outward movement thereof when the screw 8 is screwed in or out to adjust the position of the deflector. A look nut l i is provided on the screw 8 forholding it'in desired set position. By tightening up the lock nut ii any leakage of fuel from the interior of the manifold can be prevented.

it will be seen that by this construction not only can the quantity of fuel into the fuel distributing conduit be regulated, but it can be varied with respect to fuel going to the various cylinders. In brief, the flow of the fuel mixture both with respect to quantity and distribution may be regulated. The conduit l is provided with a plurality of ports i l' E leading to the cylinders. W an ordinary inlet manifold the fuel is unevenly distributed in the cylinders, the end v ylinders particularly often being starved and an excess of fuel being admitted to the middle By adjusting the deflectors T more closely together'than the deflectors 'l and 1, this can be compensated for. Moreover, although the cylinders of an internal combustion engine are usually constructionally identical, they are frequently different in operation. Use and wear increases the differences between various cylinders, so that perfect operating conditions can frequently only be obtained by careful adjustment of the quantity of fuel mixture admitted .to each cylinder.

This can be accomplished by careful regulation of the valves or deflectors 'l .to. get the desired mixture. to each cylinder, this beingdone by a trial and error method until the adjustment which gives the best results is obtained. 1

Extending longitudinally of the conduit 1 is a pipe 42 adapted to carry the exhaust gases from the motor. Surrounding the pipe I2 are a plurality of thin serrated metal discs I3 separated by spacers l4. These discs l3 not only form heat transfer fins but they also serve to create a turbulence in the fuel mixture which causes it to become thoroughly mixed. The points of the disc are spaced from the inner wall of the manifold sumciently to allow the fuel mixture to flow therebetween without reduction in volume, and the turbulence caused by the discs I3 prevents the condensation or precipitation of the fuel on the walls of the manifold. The heat of the exhaust gases which raises the temperature of the sharp points of the discs in proximity to the walls and is transferred to the fuel mixture is also a factor in eliminating condensation. The sharp points increase the efliciency of the discs as heat transfer elements. Thus the sharp points on the discs serve the double purpose of mixing and heating the fuel to increase the efliciency of the fuel mixture. It will be observed that the points on the discs l3 are in line, rather than staggered, so as not to unduly interfere with the freedom of passage of the mixture to the cylinders.

Adjacent the top of the conduit I the points on the discs l3 are cut away to avoid'interference with the passage of the fuel mixture from the charge regulating chamber into the primary conduit.

It will be understood that there may be various and means for adjusting said deflector extending through the wall of the manifold.

4. An intake manifold for a multi-cylinder engine, including a fuel distributing conduit extending generally longitudinally of the engine; ports in said fuel distributing conduit for communicating individually with the cylinders; a charge regulating chamber communicating with the primary conduit by means of an elongated longitudinally extending opening; a fuel mixture conducting deviations from the construction shown without departing from the spirit of the invention. For instance, instead of having deflectors on either side of the opening between the primary conduit l and the chamber 2, a deflector on one side only may be substituted. Likewise the shape and form of the manifold may be varied to agree with the requirements for different types of engines.

What we claim as our invention is:

1. An intake manifold for a multi-cylinder engine, including a fuel distributing conduit extending generally longitudinally of the engine; ports in said primary fuel distributing conduit for communicating individually with the cylinders; a charge'regulating chamber communicating with the conduit by means of an elongated longitudinally extending opening; a fuel mixture conduct ing riser communicating with the charge regulating chamber; and an adjustable deflector in the opening between the conduit and the chamber for regulating the flow of the fuel mixture.

' '2. An intake manifold for a multi-cylinder engine, including a fuel distributingconduit extending generally longitudinally of the engine; ports in said fuel distributing conduit for communicating individually with the cylinders; a charge regulating chamber communicating with the conduit by means of an elongated longitudinally extending opening; a fuel mixture conducting riser communicating with the charge regulating chamber; and a plurality of adjustable deflectors in the opening-between the conduit and the chamber, said deflectors being located at different points throughout the length of the said opening for regulating the flow of the fuel mixture to the ports.

3. An intake manifold for a multi-cylinder engine, including a fuel distributing conduit extending generally longitudinally of the engine; ports in said primary fuel distributing conduit for communicating individually with the cylinders; a

riser communicating with the charge regulating chamber; an adjustable deflector in the opening between the conduit and the chamber for regulating the flow of the fuel mixture; a groove in the inner wall of the manifold adapted to receive one edge of the deflector; and a rod extending through the wall of the manifold and secured to the other edge of the deflector, said rod being adapted to be moved in and out to cause the deflector to pivot in the groove.

5. An intake manifold for a multi-cylinder engine, including a fuel distributing conduit having an opening therein for admitting a fuel mixture thereto; ports in said conduit for communicating individually with the engine cylinders; a pipe extending longitudinally of the conduit for carrying exhaust gases to heat the mixture; and thin multi-pointed discs surrounding said pipe, said discs being spaced apart and their points being spaced from the sides of the conduit, said points servingto create a turbulence in the fuel mixture and transfer heat thereto to prevent condensation on the walls of the said conduit.

6. An intake manifold for a multi-cylinder engine, including a fuel distributing conduit extending generally longitudinally of the engine; ports in said fuel distributing conduit for communicating individually with the cylinders; an elongated charge regulating chamber having an opening therein for admitting a fuel mixture from a carburetor thereto; the longitudinal center line or axis of which extends longitudinally of the conduit and one long side of which opens into said conduit along one side of said conduit; and individually adjustable deflectors located at difierent places between said conduit and chamber for regulating the flow of the fuel mixture from said chamber to said conduit.

LOUIS ROSTOKER. STEPHEN J. EVELYN. 

